| | | Reporting criterion |
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| 05000293/LER-1983-001, Forwards LER 83-001/03L-0 | Forwards LER 83-001/03L-0 | |
| 05000293/LER-1983-001-03, /03L-0:on 830105,inboard Reactor Water Sample Isolation Valve AO-220-44 Did Not Close.Cause Will Be Investigated During Next Outage | /03L-0:on 830105,inboard Reactor Water Sample Isolation Valve AO-220-44 Did Not Close.Cause Will Be Investigated During Next Outage | |
| 05000293/LER-1983-002, Forwards LER 83-002/01T-0 | Forwards LER 83-002/01T-0 | |
| 05000293/LER-1983-002-01, /01T-0:on 830116,flow Ref off-normal Alarm Received.Average Power Range Monitor Flux Scram Trip Settings Affected.Cause Under Investigation.Flow Inputs Monitored & Amplifier B Recalibr | /01T-0:on 830116,flow Ref off-normal Alarm Received.Average Power Range Monitor Flux Scram Trip Settings Affected.Cause Under Investigation.Flow Inputs Monitored & Amplifier B Recalibr | |
| 05000293/LER-1983-003, Forwards LER 83-003/03L-0 | Forwards LER 83-003/03L-0 | |
| 05000293/LER-1983-003-03, /03L-0:on 830113,during Surveillance Test,Reactor Water Cleanup Sys High Flow Isolation DPIS-1243 Found Out of Calibr.Caused by Loose Switch Plant Locking Screw Which Allowed Setpoint to Drift.Setpoint Recalibr | /03L-0:on 830113,during Surveillance Test,Reactor Water Cleanup Sys High Flow Isolation DPIS-1243 Found Out of Calibr.Caused by Loose Switch Plant Locking Screw Which Allowed Setpoint to Drift.Setpoint Recalibr | |
| 05000293/LER-1983-004, Forwards LER 83-004/03L-0 | Forwards LER 83-004/03L-0 | |
| 05000293/LER-1983-004-03, /03L-0:on 830117,reactor Pressure Sys (RPS) Breaker 5 Acb 1A Overheated Causing RPS a to Trip & Initiating Half Scram to Reactor.Caused by High Internal Resistance.Breaker Replaced | /03L-0:on 830117,reactor Pressure Sys (RPS) Breaker 5 Acb 1A Overheated Causing RPS a to Trip & Initiating Half Scram to Reactor.Caused by High Internal Resistance.Breaker Replaced | |
| 05000293/LER-1983-005-01, Util Operated W/O 0.25% Delta K Shutdown Margin Required Per Tech Spec 3.3.A.1. Caused by Inappropriate Cold Critical Eigenvalue Used in GE Calculations | Util Operated W/O 0.25% Delta K Shutdown Margin Required Per Tech Spec 3.3.A.1. Caused by Inappropriate Cold Critical Eigenvalue Used in GE Calculations | |
| 05000293/LER-1983-005, Forwards LER 83-005/01T-0 | Forwards LER 83-005/01T-0 | |
| 05000293/LER-1983-006, Forwards LER 83-006/03L-0 | Forwards LER 83-006/03L-0 | |
| 05000293/LER-1983-006-03, /03L-0:on 830212,carbon Samples from One Bank of Standby Gas Treatment Sys a Train Indicated Methyl Iodine Removal Less than Tech Spec Requirement.Probably Caused by Filter Failure.Twelve Filters Replaced in Bank | /03L-0:on 830212,carbon Samples from One Bank of Standby Gas Treatment Sys a Train Indicated Methyl Iodine Removal Less than Tech Spec Requirement.Probably Caused by Filter Failure.Twelve Filters Replaced in Bank | |
| 05000293/LER-1983-007-03, /03L-0:on 830213,offsite Power Lost During Shutdown Condition.Caused by Opening of Inservice Breakers Resulting from Sensed Ground Fault Due to Salt Accumulation. Power Restored When Isolated Insulators Washed Down | /03L-0:on 830213,offsite Power Lost During Shutdown Condition.Caused by Opening of Inservice Breakers Resulting from Sensed Ground Fault Due to Salt Accumulation. Power Restored When Isolated Insulators Washed Down | |
| 05000293/LER-1983-007, Forwards LER 83-007/03L-0 | Forwards LER 83-007/03L-0 | |
| 05000293/LER-1983-008-03, /03L-0:on 830214,deviation from Tech Spec Fire Barrier Requirements Found During Conversion of Instrumentation & Control Lab to Ofc Space.Caused by Failure to Change Existing Conditions During Retrofit | /03L-0:on 830214,deviation from Tech Spec Fire Barrier Requirements Found During Conversion of Instrumentation & Control Lab to Ofc Space.Caused by Failure to Change Existing Conditions During Retrofit | |
| 05000293/LER-1983-008, Forwards LER 83-008/03L-0 | Forwards LER 83-008/03L-0 | |
| 05000293/LER-1983-009, Forwards LER 83-009/03L-0 | Forwards LER 83-009/03L-0 | |
| 05000293/LER-1983-009-03, /03L-0:on 830215,during Surveillance,Belt Driven Fuel Pump Broke on Diesel Generator A.Caused by Normal Wear.Belts Replaced | /03L-0:on 830215,during Surveillance,Belt Driven Fuel Pump Broke on Diesel Generator A.Caused by Normal Wear.Belts Replaced | |
| 05000293/LER-1983-010, Forwards LER 83-010/03L-0 | Forwards LER 83-010/03L-0 | |
| 05000293/LER-1983-010-03, /03L-0:on 830222,two of Four Motor Operator Mounting Cap Screws Found Backed Out of Core Spray Valve MOV 1400-4A.Caused by Sys Vibration.Cap Screws Installed W/Thread Compound Applied.Redundant MOV 1400-4B Inspected | /03L-0:on 830222,two of Four Motor Operator Mounting Cap Screws Found Backed Out of Core Spray Valve MOV 1400-4A.Caused by Sys Vibration.Cap Screws Installed W/Thread Compound Applied.Redundant MOV 1400-4B Inspected | |
| 05000293/LER-1983-011, Forwards LER 83-011/03L-0 | Forwards LER 83-011/03L-0 | |
| 05000293/LER-1983-011-03, /03L-0:on 830225,standby Gas Treatment Sys Filter Train B Found Inoperable Due to Soaked Charcoal.Caused by Incorrect Installation of Alison Control Solenoid Valve 191004.Charcoal Filters Replaced & Fire Watch Established | /03L-0:on 830225,standby Gas Treatment Sys Filter Train B Found Inoperable Due to Soaked Charcoal.Caused by Incorrect Installation of Alison Control Solenoid Valve 191004.Charcoal Filters Replaced & Fire Watch Established | |
| 05000293/LER-1983-012-03, /03L-0:on 830310,during ATWS Channel Surveillance Test,Atws Panel Indicator Showed Half Trip When No Trip Signal Applied.Caused by Neon Light Indicators Sensitive to Spurious Voltages.Design Change Initiated | /03L-0:on 830310,during ATWS Channel Surveillance Test,Atws Panel Indicator Showed Half Trip When No Trip Signal Applied.Caused by Neon Light Indicators Sensitive to Spurious Voltages.Design Change Initiated | |
| 05000293/LER-1983-013, Forwards LER 83-013/01T-0.Detailed Event Analysis Encl | Forwards LER 83-013/01T-0.Detailed Event Analysis Encl | |
| 05000293/LER-1983-013-01, /01T-0:on 830403,field Breaker for B Recirculation Pump Motor Generator Set Did Not Trip While Being Removed from Svc for Maint.Caused by bound-up Mechanism Preventing Breaker Opening.Breaker Linkages Lubricated | /01T-0:on 830403,field Breaker for B Recirculation Pump Motor Generator Set Did Not Trip While Being Removed from Svc for Maint.Caused by bound-up Mechanism Preventing Breaker Opening.Breaker Linkages Lubricated | |
| 05000293/LER-1983-014-03, /03L-0:on 830329,drywell Airborne Leak Detection Sys (C-19) Particulate Channel Found Reading Downscale. Caused by Loose Connector Pin.Pin Repaired & Unit Returned to Svc | /03L-0:on 830329,drywell Airborne Leak Detection Sys (C-19) Particulate Channel Found Reading Downscale. Caused by Loose Connector Pin.Pin Repaired & Unit Returned to Svc | |
| 05000293/LER-1983-014, Forwards LER 83-014/03L-0 | Forwards LER 83-014/03L-0 | |
| 05000293/LER-1983-015-03, /03L-0:on 830331,standby Gas Treatment Sys Train Opened W/O Proving Operability of Redundant Train.Caused by Miscommunication Between Insp Crew & Control Room.Need for Proper Communications Emphasized | /03L-0:on 830331,standby Gas Treatment Sys Train Opened W/O Proving Operability of Redundant Train.Caused by Miscommunication Between Insp Crew & Control Room.Need for Proper Communications Emphasized | |
| 05000293/LER-1983-015, Forwards LER 83-015/03L-0 | Forwards LER 83-015/03L-0 | |
| 05000293/LER-1983-016-03, /03L-0:on 830402,overload Annunciation Received When MOV-220-2 Switched Open During Scram Recovery.Probably Caused by Spurious Annunciator from Overload Mechanism in Cutler-Hammer Motor Control Ctr.Valve Returned to Svc | /03L-0:on 830402,overload Annunciation Received When MOV-220-2 Switched Open During Scram Recovery.Probably Caused by Spurious Annunciator from Overload Mechanism in Cutler-Hammer Motor Control Ctr.Valve Returned to Svc | |
| 05000293/LER-1983-016, Forwards LER 83-016/03L-0 | Forwards LER 83-016/03L-0 | |
| 05000293/LER-1983-017-03, /03L-0:on 830403,drywell Airborne Leak Detection Sys (C-19) Found Inoperable.Caused by Overheated Sample Air Due to Improper Thermostatic Control of Heat Tracing for Sample Lines.Lagging on Lines Removed | /03L-0:on 830403,drywell Airborne Leak Detection Sys (C-19) Found Inoperable.Caused by Overheated Sample Air Due to Improper Thermostatic Control of Heat Tracing for Sample Lines.Lagging on Lines Removed | |
| 05000293/LER-1983-017, Forwards LER 83-017/03L-0 | Forwards LER 83-017/03L-0 | |
| 05000293/LER-1983-018-03, /03L-0:on 830408,during Insp,Standby Gas Treatment Sys B Heater Contact & Wiring Found Burnt,Rendering Sys Inoperable.Caused by High Resistance Due to Loose Wires at Contactor Terminal.Contactor & Wires Replaced | /03L-0:on 830408,during Insp,Standby Gas Treatment Sys B Heater Contact & Wiring Found Burnt,Rendering Sys Inoperable.Caused by High Resistance Due to Loose Wires at Contactor Terminal.Contactor & Wires Replaced | |
| 05000293/LER-1983-018, Forwards LER 83-018/03L-0 | Forwards LER 83-018/03L-0 | |
| 05000293/LER-1983-019-03, /03L-0:on 830410,sprinkler Head Supply Pipe on Top of Turbine Stop Valves Found Severed W/Water Running from Pipe.Probably Caused by Pipe Fatigue Due to Vibration.Pipe Threaded,Installed & Visually Inspected | /03L-0:on 830410,sprinkler Head Supply Pipe on Top of Turbine Stop Valves Found Severed W/Water Running from Pipe.Probably Caused by Pipe Fatigue Due to Vibration.Pipe Threaded,Installed & Visually Inspected | |
| 05000293/LER-1983-020, Telecopy LER 83-020/01X-0:on 830502,daily Surveillance Testing Per Tech Spec Section 4.11.D Not Performed.Caused by Failure to Revise Procedures & Inadvertent Removal of Sections from Tech Specs.Procedures Revised | Telecopy LER 83-020/01X-0:on 830502,daily Surveillance Testing Per Tech Spec Section 4.11.D Not Performed.Caused by Failure to Revise Procedures & Inadvertent Removal of Sections from Tech Specs.Procedures Revised | |
| 05000293/LER-1983-021, Forwards LER 83-021/03L-0 | Forwards LER 83-021/03L-0 | |
| 05000293/LER-1983-021-03, /03L-0:on 830411,during Surveillance Test 8.7.4.3, Primary Containment Isolation Valve AO-5033B Failed to Meet 10-s Closing Time Requirements.Caused by Lubricant Infiltrating Solenoid Valve Components.Components Replaced | /03L-0:on 830411,during Surveillance Test 8.7.4.3, Primary Containment Isolation Valve AO-5033B Failed to Meet 10-s Closing Time Requirements.Caused by Lubricant Infiltrating Solenoid Valve Components.Components Replaced | |
| 05000293/LER-1983-022-03, /03L-0:on 830413,overload on Valve Motor 1301-17 Resulted in Loss of High Pressure Core Cooling Backup Capability.Caused by Oxidation in Motor End Bell & Motor Brushes,Due to Humidity Caused by Leaking Valve Packing | /03L-0:on 830413,overload on Valve Motor 1301-17 Resulted in Loss of High Pressure Core Cooling Backup Capability.Caused by Oxidation in Motor End Bell & Motor Brushes,Due to Humidity Caused by Leaking Valve Packing | |
| 05000293/LER-1983-022, Forwards LER 83-022/03L-0 | Forwards LER 83-022/03L-0 | |
| 05000293/LER-1983-023-03, /03L-0:on 830420 & 0504,diesel Generator Fuel Pump Belt a Broke.Caused by Improper Installation.Detailed Instructions Written & Belt Replaced | /03L-0:on 830420 & 0504,diesel Generator Fuel Pump Belt a Broke.Caused by Improper Installation.Detailed Instructions Written & Belt Replaced | |
| 05000293/LER-1983-024-03, /03L-0:on 830421,drywell Airborne Leak Detection Sys (C-19) Particulate Channel Found Inoperable.Caused by Failure of Heat Tracing on Sensing Line to Particulate Detector.Heat Tracing Repaired | /03L-0:on 830421,drywell Airborne Leak Detection Sys (C-19) Particulate Channel Found Inoperable.Caused by Failure of Heat Tracing on Sensing Line to Particulate Detector.Heat Tracing Repaired | |
| 05000293/LER-1983-025-03, /03L-0:on 830425,during Fire Protection Surveillance,Sliding Door in Switchgear Room Did Not Fully Close.Caused by Interference Between Knot in Counterweight Rope & Security Barrier.Knot Removed | /03L-0:on 830425,during Fire Protection Surveillance,Sliding Door in Switchgear Room Did Not Fully Close.Caused by Interference Between Knot in Counterweight Rope & Security Barrier.Knot Removed | |
| 05000293/LER-1983-026-03, /03L-0:on 830515,during Insp of Control Rod Drive Piping,Number of Vent Valve Plugs Discovered Missing.No Leaks Observed.Caused by Inadequate Procedures.Missing Plugs Replaced.Procedures Modified | /03L-0:on 830515,during Insp of Control Rod Drive Piping,Number of Vent Valve Plugs Discovered Missing.No Leaks Observed.Caused by Inadequate Procedures.Missing Plugs Replaced.Procedures Modified | |
| 05000293/LER-1983-027-03, /03L-0:on 830518,during Routine Insp,Folding Fire Door Found Inoperable.Caused by Operating Cable Becoming Detached from Pulley Due to Slack.Cable Reattached & Operating Mechanism Adjusted | /03L-0:on 830518,during Routine Insp,Folding Fire Door Found Inoperable.Caused by Operating Cable Becoming Detached from Pulley Due to Slack.Cable Reattached & Operating Mechanism Adjusted | |
| 05000293/LER-1983-028-03, /03L-0:on 830518,diesel Generator Fuel Booster Pump Belt B Parted.Caused by Broken Belt Clip & Conditions Not Allowing Immediate Replacement of Belt B When Belt a Broken.Belt B Replaced | /03L-0:on 830518,diesel Generator Fuel Booster Pump Belt B Parted.Caused by Broken Belt Clip & Conditions Not Allowing Immediate Replacement of Belt B When Belt a Broken.Belt B Replaced | |
| 05000293/LER-1983-029-01, /01T-0:on 830617,spent Fuel Pool a HX E206-A Supports Found Incapable of Withstanding Seismic Loads. Caused by Deviation from Original Design During Initial Const.Supports Modified | /01T-0:on 830617,spent Fuel Pool a HX E206-A Supports Found Incapable of Withstanding Seismic Loads. Caused by Deviation from Original Design During Initial Const.Supports Modified | |
| 05000293/LER-1983-030-03, /03L-0:on 830527,both HPCI Area Smoke Detection Sys Alarmed in Main Control Room.Caused by Valve A02301-31 Steam Leak Causing False Indications.Valve Repaired | /03L-0:on 830527,both HPCI Area Smoke Detection Sys Alarmed in Main Control Room.Caused by Valve A02301-31 Steam Leak Causing False Indications.Valve Repaired | |
| 05000293/LER-1983-031-03, /03L-0:on 830528,HPCI Sys Made Inoperable to Repair Steam Leak on AO 2301-31.Caused by Leaking Stem Packing.Packing Replaced.Valve Tested Satisfactorily.Sys Returned to Svc | /03L-0:on 830528,HPCI Sys Made Inoperable to Repair Steam Leak on AO 2301-31.Caused by Leaking Stem Packing.Packing Replaced.Valve Tested Satisfactorily.Sys Returned to Svc | |